Table I.
Basic characteristics and methodological quality of included studies.
| Sample size | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Authors | Year | Age, years | Location | Study design | Total | Lap | Open | Score | (Refs.) |
| Zeng et al | 2015 | ≥70 | R | CS | 294 | 112 | 182 | 7 | (16) |
| She et al | 2013 | ≥75 | C | CS | 434 | 189 | 245 | 6 | (14) |
| Altuntas et al | 2012 | ≥70 | R | CS | 90 | 56 | 34 | 7 | (9) |
| Robinson et al | 2011 | ≥65 | CRC | CS | 242 | 47 | 195 | 6 | (13) |
| Cummings et al | 2012 | ≥65 | C | CS | 27,436 | 424 | 27,012 | 7 | (10) |
| Hinoi et al | 2015 | ≥80 | CRC | CS | 918 | 459 | 459 | 6 | (11) |
| Moon et al | 2016 | ≥80 | CRC | CS | 142 | 71 | 71 | 6 | (12) |
| Shigeta et al | 2016 | ≥80 | CRC | CS | 107 | 52 | 55 | 5 | (15) |
Location, tumor location; R, rectal cancer; C, colon cancer; CRC, colorectal cancer; CS, cohort study; Lap, laparoscopic surgery; Open, open surgery.